List the four types of tissue found in the human body and give an example of each. 1. Epithelial
What are the characteristics of epithelial tissue? it never has contact with another cell, it always has a free surface. They contain no blood vessels (avascular) and depend on underlying tissues for needed nutrients and oxygen sources to maintain homeostasis. it is usually very thin for this reason. The cells are tightly packed together. composed almost entirely of cells. apical and basal surfaces
What is the function of epithelial tissue? protection, secretion, and absorbtion
Where is epithelial tissue found? Epithelial tissue is located on the very outside of an organ.
This is a cross section of the esophagus. Number 1 represents the lumen of the esophagus. Identify the tissue types indicated by 2 and 3. 2. stratified squamous epithelium
3. laminia propria
Below is a picture of intestinal villi. Identify the tissue type at 1 and the cell type at 3.
1. absorptive epithelium
Below is a photo of the trachea. Identify the cell modifications at 1, and the tissue types at 2 and 3. 1. mucus of goblet cell
2. pseudostratified epithelial layer
3. connective tissue
Identify the tissue type at 1 below: stratified squamous epithelia
The picture below shows kidney tubules. Identify the tissue type at 1 and 3:
simple cubodial epithelial cells
The picture below shows a cross-section of a lung. The areas labeled 2 are alveoli, the air sacs of the lungs. What type tissue is 1?
Identify the tissue and cell types below.
4. blood vessels
What are the characteristics of connective tissue?
mesenchume as their common tissue of origin, verying degrees of vascularity, nonliving extracellular matrix consisting of ground substance and fibers
What are the functions of connective tissue?
binding and support, protection, insulation, transportation
Where would you find connective tissue?
found throughout the body, most abundant and widely distributed in primary tissues
The slide below is a section of the small intestine. In this tissue, the collagen fibers are interwoven and irregularly arranged (i.e., they run in more than one direction), characteristics which provide great structural strength. The tissue is well suited for areas where tension is exerted from many different directions, such as the dermis of the skin, submucosa of the gastrointestinal tract, and fibrous capsules of organs and joints. It also forms fascia, the tough, white material that surrounds muscles.
What type tissue is the area marked by 1?
The tissue below is a loose connective tissue comprised of a semi-fluid ground substance containing several kinds of loosely-arranged fibers and cells. This is the most widespread type of connective tissue. It is found in every microscopic section of the body, fastening down the skin, membranes, vessels and nerves as well as binding muscles and other parts together. There are two types of fibers, the most numerous of which are thicker, lightly-staining collagenous fibers that crisscross the matrix in a random fashion. Thinner, more darkly stained elastic fibers composed of the protein elastin can also be seen. Lightly-staining fibroblasts that secrete the matrix materials are the principal type of cells seen.
1. fibroblast nuclei
2. collagen fibers
3. elastic fibers
This slide shows a section of tendon with regularly arranged, closely packed collagen fibers running in the same direction. This closely packed arrangement results in a flexible tissue with great resistance to pulling forces. With its enormous tensile strength,...
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